Fix #19: GWT backend client classes ending up on classpath, causing build errors.
Fix #19: GWT backend client classes ending up on classpath, causing build errors.

DaanVanYperen/libgdx-artemis-quickstart,DaanVanYperen/libgdx-artemis-quickstart,DaanVanYperen/libgdx-artemis-quickstart